Strong gravity frontier of particle physics

ABSTRACT:

In the vicinity of black holes, particle density can significantly increase, acting as efficient transducers. This is evident in the superradiant generation of ultralight bosons, which can attain Planck-scale field values.

Within this dense boson environment, we witness the occurrence of non-perturbative particle production—a phenomenon previously associated primarily with the early-universe cosmology. This talk will explore their impact on various observational channels associated with black holes, such as the high-energy neutrino observatories and Event Horizon Telescope.